It's 2105 and Cray has a killer life - literally. He spends every night hunting zombies to keep everyone else in New York safe. Of course he's alone, had a dysfunctional childhood, and could die at any moment, but that's not so bad. Right? After all, thanks to his tireless efforts and the efforts of the other Night Sweepers, society has a fighting chance of recovering from the zombie apocalypse and being normal again. Enter Jonathan Harbin, the son of the psychopath that made the virus that created the zombie horde.